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Full text of "Metallurgy Of Cast Iron"

UTILITY   OF   THE   TEST   BAR,    ETC.
537
The chemical analyses seen in Table 114 were kindly furnished by Dickman & Mackenzie, of Chicago, and Dickman & Crowell, of Cleveland.
Aside from the attention which has been called by this paper to various points in the following tests, there are two factors which some may be at a loss to understand. The first is the break in the gradual in-
TABLE 112.—STOVE  PLATE   IRON.
No. of test.	Diana, of bar. Common rule.	Micrometer.	Breaking load.	Area ofbar.	Stre'gth per >q. in. in Ibs.	Deflection.
13	1/8"	1.182"	2,5*0	1.097	2,288	0.117
14	i H"	1-745"	6,050	2.391	2,53°	0.078
15	i 15-16"	2.047"	9,900	3.2SS	3.011	o 081
TABLE 113.—BESSEMER   IRON.
No. of test.	Diam. ofbar. Common rule.	Micrometer.	Breaking-load.	Area ofbar.	Stre'gth per sq. in. in Ibs	Deflection.
16	i/s"	I-175"	2,150	1.084	1,983	O.IOO
17	i H"	1.698"	5,5<™	2.263	2,430	O.IOO
18	i 15-16"	1.991"	8,900	3-rr2	2,860	0.085
TAKLE 114.—CHEMICAL  ANALYSIS.
Specialty. Chill Roll   ..	Silicon .84	Sulphur. .071	Mang. .285
			
Gun M^tal	•73	.059	.408
			
Car Wheel ..........	.78	.132	.306
General Machinciy .....	1.30	•053	.224
Stove Plate .........	2-47	•f'94	•265
Besseraei' Iron .................	1.52	.0.50	oJ6
Phos.	Comb. Carbon.	Graph. Carbon.	Total.
•547	.61	245	3.06
•453	.76	2.47	3-23
•3*4	1.07	2.36	343
-433	•5«	331	3.89
.508	•19	4.00	4-19
|   -oS3	•49	3-73	4.22